How can I calculate the curve angle at specific points on the contour of Handwriting connected component

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Bashar Ahmed 2017-11-29

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https://ww2.mathworks.cn/matlabcentral/answers/370109-how-can-i-calculate-the-curve-angle-at-specific-points-on-the-contour-of-handwriting-connected-compo

评论： Walter Roberson 2017-12-28

Hi everybody I would like to calculate the curve angle at each point on contour. as shown in the attached figure, I want to calculate the angle (theta 1) formed by the line connecting Pi and Pi-e and the X axis and the angle (theta2) formed by the line connecting Pi and Pi+e and the X axis. having those theta1 and theta2 I can compute the curve angle at Pi. Can anyone help me in calculating theta1 and theta2. thanks in advance.